MIXTURE FOR REVEGETATION OF SLUDGE STORAGES Russian patent published in 1997 - IPC

FIELD: revegetation of waste storages. SUBSTANCE: invention relates to production of artificial ground mixtures based on activated sludge (obtained after treatment of household and industrial waste water) for revegetation of sludge storages. Objective of invention is to convert activated sludge into ground distinguishing with environmental safety and economical efficiency. Mixture is composed of (in weight parts): activated sludge, 100; fly ash, 15-20; fine-grained filler, 15-30; and aluminosilicate rock, 15-30. As fine-grained filler, mixture contains slag screening or burned molding ground and, as aluminosilicate rock, clay or adobe. Mixture may also be supplemented with lime or Portland cement in amount 2-5 wt parts or 1-2 wt parts each. Mixture provides cementation of activated sludge with no additional dehydration thereby reducing power consumption and effort. It also detoxifies sludge owing to chemisorption of contained therein heavy metal ions and destroys microorganisms, helminth ova, etc. EFFECT: facilitated revegetation of sludge storage areas. 4 cl, 2 tbl